Metal-Oxide Varistors (MOVs) Industrial High Energy Terminal Varistors > BA/BB Series BA/BB Varistor Series RoHS Description BB Series The BA and BB Series transient surge suppressors are heavy-duty industrial Metal-Oxide Varistors (MOVs) designed to provide surge protection for motor controls and power supplies used in oil-drilling, mining, transportation equipment and other heavy industrial AC line applications. BA Series Agency Approvals Agency Agency Approval Agency File Number UL1449 E320116 - for BA Series only. These varistors have similar package construction but differ in size and ratings. The BA models are rated from 130 to 880VM(AC). The BB models from 1100 to 2800VM(AC). Both the BA and BB Series feature improved creep and strike capability to minimize breakdown along the package surface, a package design that provides complete electrical isolation of the disc subassembly, and rigid terminals to ensure secure wire contacts. See BA/BB Series Device Ratings and Specifications Table for part number and brand information. Features Additional Information • High energy absorption capability WTM Datasheet Resources Samples BA Series 3200J BB Series 10,000J • Wide operating voltage range VM(AC)RMS BA Series 130V to 880V BB Series 1100V to 2800V • Rigid terminals for secure wire contact • Case design provides complete electrical isolation of disc subassembly • Littelfuse largest packaged disc 60mm diameter • No derating up to 85ºC ambient • RoHS compliant Absolute Maximum Ratings • For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) DC Voltage Range (VM(DC)) BA Series BB Series Units 130 to 880 1100 to 2800 V 175 to 1150 1400 to 3500 V 50,000 to 70,000 70,000 A 450 to 3200 -55 to +85 -55 to +125 <0.01 3800 to 10000 -55 to +85 -55 to +125 <0.01 J C O C %/OC 5000 5000 V 1000 1000 MΩ Transients: Peak Pulse Current (ITM) For 8/20µs Current Wave (See Figure 2) Single Pulse Energy Range For 2ms Current Squarewave (WTM) Operating Ambient Temperature Range (TA) Storage Temperature Range (TSTG) Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current Hi-Pot Encapsulation (COATING Isolation Voltage Capability) (Dielectric must withstand indicated DC voltage for one minute per MIL–STD–202, Method 301) COATING Insulation Resistance O CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 Metal-Oxide Varistors (MOVs) Industrial High Energy Terminal Varistors > BA/BB Series BA/BB Series Ratings & Specifications Maximum Rating (85°C) Continuous Part Number BA Series V131BA60 V151BA60 V251BA60 Specifications (25°C) Transient Varistor Voltage at 1mA DC Test Current Maximum Clamping Volt VC at 200A Current (8/20µs) Typical Capacitance f = 1MHz VRMS VDC Energy (2ms) Peak Current 8 x 20µs VM(AC) VM(DC) WTM ITM Min VN(DC) Max VC C (V) (V) (J) (A) (V) (V) (V) (V) (pF) 130 150 250 175 200 330 450 530 880 50000 50000 50000 184.5 216 351 205 240 390 225.5 264 429 340 400 620 20000 16000 10000 V271BA60 275 369 950 50000 387 430 473 680 9000 V321BA60 V421BA60 V481BA60 V511BA60 V571BA60 V661BA60 V751BA60 V881BA60 320 420 480 510 575 660 750 880 420 560 640 675 730 850 970 1150 1100 1500 1600 1800 2100 2300 2600 3200 50000 70000 70000 70000 70000 70000 70000 70000 459 612 675 738 819 945 1080 1350 510 680 750 820 910 1050 1200 1500 561 748 825 902 1001 1155 1320 1650 760 1060 1160 1300 1420 1640 1880 2340 7500 6000 5500 5000 4500 4000 3500 2700 BB Series V112BB60 V142BB60 V172BB60 V202BB60 V242BB60 V282BB60 1100 1400 1700 2000 2400 2800 1400 1750 2150 2500 3000 3500 3800 5000 6000 7500 8600 10000 70000 70000 70000 70000 70000 70000 1665 2070 2500 2970 3510 4230 1850 2300 2765 3300 3900 4700 2035 2530 3030 3630 4290 5170 2940 3600 4300 5200 6200 7400 2200 1800 1500 1200 1000 800 NOTE: Average power dissipation of transients not to exceed 2.5W. See Figures 3 and 4 for more information on power dissipation. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 Metal-Oxide Varistors (MOVs) Industrial High Energy Terminal Varistors > BA/BB Series Peak Pulse Current Test Waveform PERCENT OF PEAK VALUE Power Dissipation Ratings PERCENT OF RATED VALUE 100 90 80 70 60 50 40 30 20 50 60 70 80 90 100 110 120 130 50 Should transients occur in rapid succession, the average power dissipation required is simply the energy (watt-seconds) per pulse times the number of pulses per second. The power so developed must be within the specifications shown on the Device Ratings and Characteristics Table for the specific device. Furthermore, the operating values need to be derated at high temperatures as shown in the above diagram. Because varistors can only dissipate a relatively small amount of average power they are, therefore, not suitable for repetitive applications that involve substantial amounts of average power dissipation. Stand by Power Dissipation vs Applied VRms at Varied Temperatures Typical Stability of Standby Power Dissipation at Rated VRMS vs Time 0.5 POWER DISSIPATION (W) PER kV OF RATED V RMS POWER DISSIPATION (W) PER kV OF RATED V RMS 1,000 HOURS, TA = 85oC 0.6 0.4 MAX AT TA = 25oC 0.1 0.08 TYP AT TA = 25oC 0.06 0.04 80 90 100 110 FIGURE 3. STANDBY POWER DISSIPATION vs APPLIED VRMS AT VARIED TEMPERATURES 0.4 0.3 0.2 0.1 0 PERCENTAGE OF MAXIMUM RATED V RMS (%) Figure 3 T2 01 = Virtual Origin of Wave T = Time from 10% to 90% of Peak T1 = Rise Time = 1.25 x T T2 = Decay Time Example - For an 8/20 µs Current Waveform: 8µs = T1 = Rise Time 20µs = T2 = Decay Time MAX AT TA = 85oC 0.2 TIME FIGURE 2. PEAK PULSE CURRENT TEST WAVEF TYPICAL TEMPERATURE COEFFICIENT OF POWER DISSIPATION = 2.2%/ oC 1.0 0.8 T T1 Figure 2 FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE Example: For an 8/20 s 8 s = T 1 = Virtual Fron 20 s = T 2 = Virtual Time 10 140 150 AMBIENT TEMPERATURE ( oC) Figure 1 O1 = Virtual Origin of T = Time From 10% T 1 = Virtual Front Tim T 2 = Virtual Time to H 90 O1 10 0 -55 100 Figure 4 0 10 100 TIME AT RATED V RMS (HOURS) 1,000 FIGURE 4. TYPICAL STABILITY OF STANDBY POWER DISSIPATION AT RATED V RMS vs TIME © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 Metal-Oxide Varistors (MOVs) Industrial High Energy Terminal Varistors > BA/BB Series Maximum Clamping Voltage BA Series Maximum Clamping Voltage BB Series V131BA60 - V881BA60 30,000 MAX CLAMPING VOLTAGE DISC SIZE 60mm 130 TO 880VM(AC) RATING TA = -55oC TO 85oC 3,000 V511BA60 V481BA60 V421BA60 V881BA60 V751BA60 V661BA60 V571BA60 1,000 900 800 700 600 V321BA60 500 V271BA60 V251BA60 V112BB60 10 -1 10 0 Figure 5 10 1 10 2 10 3 PEAK AMPERES (A) 10 4 10 3 1,000 10 4 DISC SIZE 60mm V131BA60 - V321BA60 20,000 10 5 10 6 5,000 10 2 2,000 10 3 1,000 10 4 500 10 5 200 10 6 100 50 50 20 10 5 2 10 10,000 200 100 10 4 DISC SIZE 60mm V421BA60 - V282BB60 1 50,000 SURGE CURRENT (A) SURGE CURRENT (A) 2 10 2,000 10 3 FIGURE 6. CLAMPING VOLTAGE FOR V112BB60 - V282BB60 100,000 5,000 10 1 10 2 PEAK AMPERES (A) V421BA60 - V282BB60 1 10 2 10 0 Repetitive Surge Capability BB Series V131BA60 - V321BA60 50,000 10 -1 Figure 6 Repetitive Surge Capability BA Series 500 2,000 10 -2 10 5 FIGURE 5. CLAMPING VOLTAGE FOR V131BA60 - V881BA60 10,000 V282BB60 5,000 V242BB60 4,000 V202BB60 3,000 V142BB60 300 V151BA60 V131BA60 20,000 10,000 9,000 8,000 7,000 6,000 V172BB60 400 200 10 -2 MAX CLAMPING VOLTAGE DISC SIZE 60mm 1100 TO 2800VM(AC) RATING TA = -55oC TO 85oC 20,000 MAX PEAK VOLTS (V) MAXIMUM PEAK VOLTS (V) 6,000 5,000 4,000 2,000 V112BB60 - V282BB60 INDEFINITE 10 20 Figure 7 20 INDEFINITE 10 100 1,000 IMPULSE DURATION (μs) 20 10,000 FIGURE 7. SURGE CURRENT RATING CURVES FOR 100 Figure 8 1,000 10,000 IMPULSE DURATION ( μs) FIGURE 8. SURGE CURRENT RATING CURVES FOR V421BA60 - V282BB60 NOTE: If pulse ratings areV131BA60 exceeded, a- V321BA60 shift of VN(DC) (at specified current) of more than +/-10% could result.This type of shift, which normally results in a decrease of VN(DC), may result in the device not meeting the original published specifications, but it does not prevent the device from continuing to function, and to provide ample protection. Physical Specifications Environmental Specifications Lead Material BA / BB – Copper with Tin Plating Operating Temperature -55°C to +85°C Insulating Material Cured, flame retardant epoxy polymer meets UL94V–0 requirements. Storage Temperature -55°C to +125°C Device Labeling Marked with LF, Part Number and Date code Humidity Aging +85°C, 85% RH, 1000 hours +/- 5% typical resistance change Thermal Shock +85°C to -40°C 10 times +/- 5% typical resistance change Solvent Resistance MIL–STD–202, Method 215 Moisture Sensitivity Level 1, J-STD-020 © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 BB Series 40.0 (1.575) Metal-Oxide Varistors (MOVs) M6 INTERNATIONAL THREAD PAN HEAD SLOTTED SCREW Industrial High Energy Terminal Varistors > BA/BB Series 10.5 (0.41) 44.5 (1.752) 7.0 (0.28) 10.5 (0.41) 86.0 (3.38) 100 (3.94) Dimensions 40±2 (1.575 ± 0.08) BA Series M6 INTERNATIONAL THREAD 40.0 (1.575) M6 INTERNATIONAL THREAD PAN HEAD SLOTTED SCREW 23.5 (0.925) 7.0 (0.28) 86.0 (3.38) 95 (3.74) MAX 100 (3.94) 79±3 (3.11±0.12) BB Series 40.0 (1.575) 6 (0.24) M6 INTERNATIONAL THREAD PAN HEAD SLOTTED SCREW 10.5 (0.41) 86±2 (3.38±0.08) 100 (3.94) 44.5 (1.752) 7.0 (0.28) Notes: Typical weight: BA Series:250g and BB Series: 600g Dimensions are in mm; inches in parentheses for reference only. 10.5 (0.41) 86.0 (3.38) 100 (3.94) 40±2 (1.575 ± 0.08) Part Numbering System M6 INTERNATIONAL THREAD V XX X BA 60 VARISTOR DISC SIZE (60mm) VM(AC) SERIES DESIGNATOR First Two Significant Digits* 95 (3.74) MAX 79±3 (3.11±0.12) BA or BB VM(AC) Decade Multiplier* (1 or 2) *Refer to Rating & Specifications table Examples: 130 VM(AC) = 131 2800 VM(AC) = 282 6 (0.24) 86±2 (3.38±0.08) 100 (3.94) © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15